Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
نویسندگان
چکیده
منابع مشابه
Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
The widely used nonperturbative wave functions and distribution functions of QCD are determined as matrix elements of light-ray operators. These operators appear as large momentum limit of nonlocal hadron operators or as summed up local operators in light-cone expansions. Nonforward one-particle matrix elements of such operators lead to new distribution amplitudes describing both hadrons simult...
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Article history: Received 4 April 2014 Accepted 7 May 2014 Available online 20 May 2014 Editor: A. Ringwald QCD in non-integer d = 4 − 2 space–time dimensions possesses a nontrivial critical point and enjoys exact scale and conformal invariance. This symmetry imposes nontrivial restrictions on the form of the renormalization group equations for composite operators in physical (integer) dimensio...
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The twist three contributions to the Q2-evolution of the spin-dependent structure function g2(x) are considered in the non-local operator product approach. Starting from the perturbative expansion of the T-product of two electromagnetic currents, we introduce the nonlocal light-cone expansion proved by Anikin and Zavialov and determine the physical relevant set of light-ray operators of twist t...
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The non–singlet and singlet anomalous dimensions of the twist–2 light–ray operators for unpolarized and polarized deep inelastic scattering are calculated in O(αs). We apply these results for the derivation of evolution equations for partition functions, structure functions, and wave functions which are defined as Fourier transforms of the matrix elements of the light-ray operators. Special cas...
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ژورنال
عنوان ژورنال: Fortschritte der Physik/Progress of Physics
سال: 1994
ISSN: 0015-8209,1521-3979
DOI: 10.1002/prop.2190420202